Lamp base



FIGS. 1 and 2 are perspective views of a lamp base showing our newdesign;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof, the opposing left side view being amirror image;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines shown in the drawings are included for purposes ofillustrating environment or portions of the lamp base and form no partof the claimed design.

CLAIM The ornamental design for a lamp base, as shown and described.